I had to laugh.
Time? We're worried about prep time in BBQ? Tell you SIL it's done when it's done
I could care less (it's me) how long it takes if the end product is what I want.
Timing of pulling it off the smoker is the big issues for most people, but I think this is the first post I remember about someone wanting to save time.
But I take NO shortcuts in my Q because I want the end product to be outstanding.
The BEST timesaver you have is your smoker. You don't have to tend the fire and keep it stoked all night with wood or something.
Just tell him to enjoy the end product and be happy
Now if it's a real question, I'm sure the guys in the forum can help you save a little time, but for me, I just think it's too much to worry about. Enjoy the experience.